UNIT4

1. His employers could not complain about his work becausehe was ______ in the performance of his duties.

A. derelictB. penetrating

C. diversifiedD. assiduous.


(点击右边三个点，可调整速度，电脑上可下载)

employer雇主，老板

employee雇员

assiduous勤奋的

insidious阴险的，狡诈的

derelict遗弃物

relics遗骨

relict残余物

penetrate穿透

permeate渗透

diffuse弥漫

diversify使不同